Big simle. You should have gone to the original tire store to have them balanced. Perhaps a weight fell off? The second shop is also in the business of selling tires, so who is right? The shop that can show you the tread separation, like the one I went to when I thought it just needed a balance.

I suggest YOU rotate the wheels, front to rear, and drive it again. If the pulling to the right goes away and the imbalance comes back, go to the original tire store and have them balance the tires.

You might need an alignment, but do that after the tires are balanced and use a different shop for that. I found a very good alignment shop by asking a local garage where they send their customers cars - most Mom&Pop shops do not have the equipment.

Klaus
--
Did you do your Random Act of Kindness today?